Offset Detect Pins for USB Plug Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing USB 3.0 PD receptacle's complex arrangement of insertion detect pins and PD detect pins makes it difficult to design an improved connector that can accurately detect different types of plugs, including USB 2.0 and thin cards, for efficient power transmission.
Innovation Solution
An electrical connector with a simplified configuration featuring an insulative housing, metallic shell, and two offset detect pins (first and second detect pins) that protrude into the receiving cavity, allowing any USB plug, including thin cards, to trigger the insertion detection while only the USB PD plug can activate the power detection circuit due to its longer front part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detect pins (insertion detect pins and PD detect pins) are arranged in the USB 3.0 PD receptacle, then the detection accuracy for different plug types is improved, but the device complexity increases
Solution Approach 1:
The patent combines the insertion detection function and PD detection function into a single detect pin structure. The detect pin is positioned to perform both functions: detecting plug insertion and detecting whether a PD-capable plug is connected, thereby reducing the number of pins from multiple separate detect pins to a single integrated detect pin.
Solution Approach 2:
The detect pin is designed with multi-functionality to serve dual purposes: it acts as both an insertion detect pin and a PD detect pin. This universal design allows the same component to perform multiple detection tasks, simplifying the overall pin arrangement while maintaining comprehensive detection capabilities.
2Adaptability or versatility
If the detect pins are positioned to detect all plug types accurately, then the detection capability is improved, but the structural complexity of the connector increases
Solution Approach 1:
The detect pin is positioned at a specific location within the receiving cavity where it can selectively interact with different plug types. The pin's position and dimensions are optimized to detect the presence of various plugs (USB 2.0, USB 3.0, USB PD, thin cards) without requiring complex structural modifications throughout the entire connector.
3Reliability
If additional detect pins are added to the receptacle, then the power transmission safety is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The patent merges the safety detection functions into a single detect pin that can identify whether a PD-capable plug is connected. This reduces the manufacturing complexity compared to assembling multiple separate detect pins, while still ensuring power transmission safety by preventing power delivery when incompatible plugs are detected.
Data Source
AI summary
An electrical connector comprises an insulative housing, a metallic shell surround the insulative housing, a plurality of contacts and two detect pin retained to the insulative housing. The insulative housing is formed with a base and a tongue extending forwardly from the base. The shell and the insulative housing define a receiving cavity therebetween. The two detect pins are fastened to two opposite ends of the insulative housing, respectively, each has a detecting portion located in the receiving cavity, and the detecting portions of the two detect pins are disposed offset along a front-to-back direction for being selectively pushed by the mating plug. One of the contacts is formed with a wing contacting with the first detecting portion. The electrical connector can detect insertions of different mating plugs via the detect pins.